Effects of Methylprednisolone Plus Ropivacaine Infiltration Before Wound Closure on Laminoplasty or Laminectomy

Summary

Laminoplasty and laminectomy are useful surgical procedures for the management of various conditions pertaining the spinal cord such as myelopathy, radiculopathy, neoplasm, stenosis, disc herniation, hematoma, abscess, traumatic injuries, etc. Both are generally effective procedures that decompress the spinal cord by expanding the space available for the spinal cord. Both procedures provide good neural decompression and functional improvement after surgery, thereby preventing catastrophic cord injury. However, patients undergoing these procedures experience severe pain in the postoperative period; this may lead to the increase in postoperative morbidity and complications. Suboptimal analgesic therapy causes discomfort to the patient and could increase the incidence of postoperative complications, prolong hospital stay and increase health expenses. The extensive exposure to multiple levels in spine surgeries lead to postoperative pain caused by muscular dissection and requires adequate pain relief to hasten rehabilitation, so that the incidence of chronic pain is significantly decreased. This pain is usually treated with intramuscular, epidural or IV-PCA (Intravenous- Patient Controlled Analgesia) opioids. Several oral analgesics, intermittent intravenous and intramuscular injections and PCA with several systemic side effects, have long been used for the control of postoperative pain. In 1953, Lewis et al. established that local infiltration is a reliable pain relief technique for postoperative pain, with the advantages of safety, simplicity and low cost. The intraoperative injection of 40 mg of methylprednisolone via the intra-buccal approach into the masseter muscle has found to have significantly reduced swelling, trismus and postoperative pain associated with the surgical extraction of impacted lower third molars. A single, preoperative dose of Methylprednisolone 125 mg IV before Total Knee Arthroplasty led to improvement of postoperative analgesia and immediate recovery, when combined with an extensive, multimodal oral and local infiltration analgesic regime. Preemptive administration of bupivacaine or bupivacaine plus methylprednisolone to the paravertebral muscles in patients undergoing lumbar discectomy has been proved to provide effective analgesia in the early postoperative period, when compared to patients who received no local anesthetic or steroid. The infiltration of levobupivacaine and bupivacaine plus methylprednisolone in single distance-single site, lumbar disc surgery established that postoperative analgesic requirement was significantly lower and the first analgesia demand time was also significantly later in the local anesthesia plus methylprednisolone group, compared to the control group. A randomized controlled trial of a larger scale, with a longer follow-up period, could provide a more significant data. Therefore this study has been designed as a prospective, randomized, open-label, blinded endpoint (PROBE) study with a 1 month follow-up period, to compare the efficacy of methylprednisolone plus ropivacaine versus ropivacaine alone, administered before wound closure, for providing analgesia after laminoplasty and laminectomy.

Conditions

• Postoperative Pain
• Neurosurgery

Interventions

DRUG

Methylprednisolone 40 mg + Ropivacaine + Saline

To infiltrate the study solution, the surgeon will inject the incision site with a 10 cm long, 22-gauge needle before the closing of the incision site. A standard volume of 10 ml in each level will be injected, based on the study by Milligan et al., with a total of 5ml study solution injected laterally into the erector spinae muscle and 5 ml subcutaneously along both margins of the incision. This standardization will be on the basis of the number of levels to be treated, and will be consistent in each patient. The depth of penetration will include the subcutaneous tissues, paravertebral muscles, along with the deep muscles surrounding the spinous process, lamina, transverse process and facet joints; the epidural space and intrathecal space will be spared. The local infiltration solution in the treatment group will consist of a total of 30 ml study solution, containing 1 ml of 40 mg methylprednisolone plus 15ml of 1% ropivacaine and 14 ml saline.

DRUG

Ropivacaine + Saline

To infiltrate the study solution, the surgeon will inject the incision site with a 10 cm long, 22-gauge needle before the closing of the incision site. A standard volume of 10 ml in each level will be injected, based on the study by Milligan et al., with a total of 5ml study solution injected laterally into the erector spinae muscle and 5 ml subcutaneously along both margins of the incision. This standardization will be on the basis of the number of levels to be treated, and will be consistent in each patient. The depth of penetration will include the subcutaneous tissues, paravertebral muscles, along with the deep muscles surrounding the spinous process, lamina, transverse process and facet joints; the epidural space and intrathecal space will be spared. The local infiltration solution in the control group will consist of a total of 30 ml study solution, containing 15 ml of 1% ropivacaine and 15ml saline.

Sponsors & Collaborators

• Beijing Tiantan Hospital

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

SINGLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

64 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2020-07-31

Primary Completion

2021-04-06

Completion

2021-05-06

Countries

• China

Study Locations